Well that is an interesting take on the Specialty Dining Program !
As shof515 has posted start with the waiter but then - - -
I think at first that the crew may refuse this as being complicated.
But run it by the Guest Services people in advance get the hotel
manager or a restaurant manager involved - For a birthday dinner
they should be able to do something including providing the cake !
Good Luck and come back post cruise and let us know the results !

The cruise industry may take a hint from how the airlines are handling the spacing load reduction factor.
Empty middle seats - every other cabin (inside OV Balcony) not occupied
First/Business class - half occupancy - suites (Havens) maybe 3/4s occupied
Solution wrap a revolving dart board in a piñata costume and thrown blindfolded darts.
Heck who knows what madness will develop a plan out of this.
And as always "For Your Convenience why of course" !

Maybe this is where the twain shall meet -
Norwegian downgrading theirs to match the competition -
AND
The competition upgrading theirs to match NCL -
Insides Ocean View and Balcony not much difference overall in the industry -
BUT
Get into the Suites and high roller accommodations and there is a difference -
Mostly in the Butler department -
A Concierge is pretty much a given with all cruise lines - some better than others !
Pay more get more services perks bonuses priorities !
Like that recent TV insurance commercial - "Only Pay for What You Need***" *** change to WANT !
With the curtailment of cruising at present - there should be intense competition in the booking of
future cruises with the money being saved at this time - although the fares may (will) go up when
cruising resumes.

Presently the only thing missing is Haven access - business as usual.
"BUT" !
There is the possibility that the perks benefits service maybe cheapened -
you know NCL's famous *"FEE"*-Style sailing program !
YES you do read "somewhere" about this demise of the benefits -
nothing yet official in print from NCL !
You will know about it when your invoice requires you to bring your own oars to propel the ship ! LOL !

Here is the break-down ---
As you suspected the master bed(room) sleeps -2-
The 2nd BR sleeps -2- one on the couch and one in a pull-down Pullman
Now things get tricky here - in the Main cabin room the couch pulls out
revealing sleeping for -2- well not quite full size adults.
2BR

Out somewhere in the north Pacific Ocean ?
Left San Pedro 5/22 - destination Honolulu
Change course 5/25 - destination Osaka
Marine tracking - NCL JOY is out of range - - -
I don't know the number of days to cruise from the US mainland to Japan
But the JOY is now 10 days at sea
Latest CC report destination is now Busan - ETA ?

An awkward work around this would be to substitute Ensenada* Mexico for Victoria BC Canada
*BUT* then a 7 day cruise would not see much if any of Alaska !
Until Canada comes to some kind of an agreement with the cruise lines - Alaska cruises are
done until such time - including the Vancouver Seward (Anchorage) cruises.
* That PVSA - Ensenada is the only foreign port with a ghost of a chance of satisfying the requirement
within the frame of a 7 day cruise.
So until the PVSA is amended - this is the status quo
After this virus crisis - time for the USA and Canada to lighten-up on cruise regulation - both countries
share in the economics of this !

Get that Magic "8" Crystal Ball out of moth balls and we will see the answer therein !
Or perhaps the Ouija board would be a better more promising source of information !
We shall see what we shall see all in good time -
So disregard that man behind the curtain making all the booking announcements.
With the capacity spaced-out restraints yet to be determined and food service issues
to be finalized - Que Sera Sera - heck - land based restaurants haven't opened fully.
And as always READ the "'fine print'" - until then dream on about that cruise !

Hawaiian quarantine extended - LINK:
https://www.aol.com/hawaii-extend-2-week-traveler-222700351.html
Does not apply to guests connecting at Honolulu to other countries - no stop-overs however.
Really a tourist killing season - POA at mooring - port of Honolulu.